#include "stdio.h"

int main(){

    char c;

    scanf("%c",&c);

    switch (c){
        case 'a':
        case 'A': printf("this is a\n");break;
        case 'b': printf("this is b\n");break;
        case 'c': printf("this is c\n");break;
        default: printf("this is aother\n");break;
    }

    

    return 0;
}